3M RANDOM ORBITAL NON-VACUUM SANDER – Non-vacuum sanders. Sanders are available in 5″ and 6″. MOS: 12,000 RPM. Non Vacuum sanders come with a 3M Stikit Disc Pad for use with Stikit abrasive discs. 5″ sander has a 3/16″ and the 6″ is either a 3/16″ or 5/16″ orbit. The larger the orbit, the more aggressive the sander. Product is sold by the each.